@TheFu
This is a good explanation of the various satellite orbits.
A relatively simple summary: https://earthobservatory.nasa.gov/fe.../OrbitsCatalog
In my previous life, I worked for a contractor whose mission was to operate and maintain NASA's Tracking and Data Relay Satellite System (TDRSS). All of the satellites are in geo-synchronous orbits.
Here are two links that explain the complete system.
https://en.wikipedia.org/wiki/Tracki...tellite_System
https://www.nasa.gov/mission/trackin...ay-satellites/
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